Models of flow through sponges must consider the sponge tissue | Nature
Phylum Porifera: Sponges have specialized cells but no tissues; no symmetry –Sponges are the most primitive animals on Earth 570 million year old fossils. - ppt download
Porifera | CK-12 Foundation
Porifera are multicellular, while they don't have tissue. Why? - Quora
Porifera cells hi-res stock photography and images - Alamy
Organisation of the Poriferan body
Porifera Characteristics, Body Plans & Circulatory Systems | Study.com
Porifera - Digital Atlas of Ancient Life
Solved QUESTION 16 All of the following have true tissues | Chegg.com
Phylum Porifera – The zoology corner
Phylum Porifera
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Wounding response in Porifera (sponges) activates ancestral signaling cascades involved in animal healing, regeneration, and cancer | Scientific Reports